Adjustment for the backs of type-writer chairs.



y I 0.1. TRAVERS. ADJUSTMENT EORTHEKBAC/KS 0F TYPE'WRHER CHAIRS.

:APPLICATION FILED OCI'. Il. IQII.

Patented Apr, 16,1918. l

'Il Y Il Il All ATTORNEY.

EUNTE S T FEES,

CHARLES Jprnnvnzae, or ronT WASHINGTON, WISCONSIN.

ADJUSTMENT non THE BncKs or TYPE-WRITER CHAIRS.

Specification of Letters Patent.

Patented apr. 16,1918,

Original application filed September 4,1917, Serial No. 189,517. Dividedand this application led Dotober f 11, 1917. Serial No. 195,876.

To all whom it may concern: `Be it known that I, CHARLES J. TRAVERS, acitizen of the United States, residing at Port Vashington, in the countyof Ozaukee, State of Wisconsin, have invented a new and usefulAdjustment for the Backs of rlype- Writer Chairs, of which the followingis a specification.

This invention particularly relates to improveniente in chairsV intendedfor the use of type-writer operators and others wherein theback-standard is adjustably connected with and supported by rearwardlydisposed back-supporting-arms.

Generally, in this class of chairs, it has been customary to provide forthe raising and lowering of the back-pad by connecting the latter uponthe .back-standard in some adjustable manner, various styles ofdevicesbeing used for this purpose.; also, to pivot the lower end of theback-standard upon or between the supporting-arms by means of aclamping-bolt and wheel, such devices being employed to afford a pivotaladjustment for the back-standard.

The objects of the present invention are to .provide a simple means forconnecting the lower end of the back-standard to the supporting-arms,such means being of-such construction as will-provide for botha pivotaland vertical adjustment of thewbackstandard, so that the back-pad may berlgidly attached to the back-standard and yet to all intents andpurposes, be adjustable both vertically and pivotally.

Other objects andadvantages of the invention will hereinafter appear andthe novel features thereof will be particularly pointed out in theclaims.

Referring to the drawing- Figure 1 is a top plan view of an adjustmentfor type-writer and otherchair's (the front portions of the spider-armsbeing broken away to conserve space), a backstandard being shownconnected thereto in accordance with l:my invention, .the backstandardbeing shown in transverse section, as are also the rear ends of theStandardsupporting arms and the-supportmgyoke;

F ig. 2 is a side elevation of the same, the back-standard being brokenaway at its upper portion and its lower portion shown in verticalsection; and 5 Fig. 3 is a detail in perspective ofthe tilting yokeemployed to adjustably connect the lower end of the back-standard to thestandard-supporting arms.

Similar numerals of reference indicate similar parts in all the figuresof the draw- Ing.

In practising my invention, it will be understood that it may be used inconnection with any chair adjustment wherein are employed a pair ofrearwardly disposed backstandard supporting-arms,Y and, therefore, thatthe invention is not limitedin its application to the chair-adjustmentherein illustrated and described, the novel features of the latterforming the subject-matter of a companion application iiled September4th, 1917, Serial Number 189,517, of whichv this is a divisionalapplication. c f

In the present construction .of chair-adjustment, 1 designates theopposite spiderarms, preferably formed of angle-iron, as is usual, andrelatively positioned so that their upper horizontal flanges extendoutward. These arms are connected ,at their rear ends by a transversebrace 2, the ends of which overlap the 'arms and are riveted inposition, as at43. The ends of the arms are provided with apertures 4,forthe reception of screws, by means of which the .Seat v (not shown)`may-be secured in position.

`At about their middles, the arms maybe connected by a bridge 5, theends of thc bridge being connected to the vertical flanges of the armsin any desired manner. The bridge 5, is provided with an opening 13, atits longitudinal center, and receives the upper end of the usualsupporting-post or adjusting-standard 14, the upperend of the latterbeing usually upset, as at 15', tomake a permanent connection betweenthe bridge and the post. l

Having its opposite ends located in suitable apertures formed in thevertical flanges of the two spider-armsand immediately in Verticaltension-bolt 17, the same near its lower end carrying an aperturedspringsupporting'waslrer 18, and'below thev same a'v hand-wheel 19 thelatter threadedon theA bolt.

Across-brace 26, formed of sheetn1etal,`

and"h"a\fing down-turned 'ends is interposed between-'the' armsy 16,y.and serves to conii'eci-,-. the same, the cross-brace being located1in-fm f disposed-terminals respectively designated as`24: and25. Theupper1 terminals-ene gage underk th'erbrae'e '26' connecting tlreftiiiostan'd'ardlsupportin-g "arms 16, and' lthe lower terl'niiialsl rest uponthe-'washerf 18'; It will be' obvious that l the tendency of the'termfifialsPoffthelspringsis to`g spread'7 so that the lower terminalsbeing? sup'ported by; the washer 18; thei 'upper 'terminals will exert alifting tendency to vthe a'z'msf-1`6, andv 'the lati ter will thereforefyielfclinlglyresist the .weight ol'theffoocupaiift of theseat asitis-exerted against tlre'fba'ck-, Vall as will ihereiiia-ter 'aps peari Itwill befobviousfthat thisresistance may`5 bei regulated byf propermanipulation ofithe handlwheel 19, through which the washer18mayb'eraised and lowered 011- the tens'oirboltgr v Betweeiir'th'e rear'e'ndls'of the 'armsflglis' located'aii ai'i'g'gail'ar` or' Uslfapecl'slreetimetal yokeQS, the 'forwardly'. 'projecting side-walls 31,1oli'1=which,ar`e -pivota'lly connected-'near their-f'Y rear? ends.- ytothe"r said-'- arms by means offA rivets .30,1 oppositelfy located and ypassed through YYapertu-resI '29,' I foi-'med in the* sidewalls :of itheyoke'V and 'through l correspondirrgape-rtui'e-sformed in* lthe" arms:yrByeA tiri-s arrangement; the yoke isycapabfle 'ofV tilting or .assumingv'inclinedipositions in' respect to safidfzarms! 16;?y Near theirfronitf end`s, the walls Blof the yoke are provide'diwithfop@ plositelsiiiiiflarcompanion slots @32,the same being:fconcentriet fwith vrthei'f apertures 29 `and hence the-rivets 30,*.anfdf`the arms lfiaref'prtrvided withv l opposite'ijransyerse-I perforations 33, ooincid'ent withrsaid`l slots@ Through these slots-J andAX perfo'rations is`` passed" aclam'pi-"ngbo'lt Slgfat! one? end' off wlii'ch is located-aliandwheel35.'v Ilprefei1i to mount uponthie boltiafaird interpose"between thewalls-B'llofthe yokefat this point,E a spa'eini "-i sleeve* 36','-against the f ends* of which f 'the walls-*31'g of" the 'yoke may`befcl'ampied 4tby I'the action of the boltf'anfd its hand-wheel It willbei 'apparentE that the hand-wheel Ebeing V sulilciontlyloosened5uponthe bolt, the yoke may be tiltedv to any position withinthe limits of its slots 32, yand by retightening theJ wheel4the'yok'e'will be clamped' between thearms 16 randthe` endsof thespacingsleeve andthus firmly held.A

Within the yoke 28, is mounted the lower end of the back-standard 37,and these two' elements `may beiconiaected ini suitable mlanneis-eitherrigidly or adjustably, as desired. As, however, I prefer that thebackstandard be made-vertically adjii'fst'ablefv in tlrefyoke,wh'erebyy'an adjustable connection between-'f the beek-parli andi saidstandard may -beomittedan-d the back-pad raised l"and lowered bya fraising and f loweringI4 offfthe standard, irrthis instanceI f proa/ide`fior-corr-y nectnglsaid"lbaekestandardadjustabiyrwth; in the yoke. By sodoing, I noti-oilily am enabled Qtoattach thef back-piad- (not 5 shown)permanently and rigidlyw to f the'A standard, thuseforniiirgf a umorei*rigid structurer but lI save' theV --costof the usual sep aratef Aadjustable'eomiecton: Moreoverglfavod:project# ing parts at thispointthat-arefaptito catch oir -the clothing 'ofthefoccupahtolf-the'chain and -iifnallyrg I 'lilakei a'mluch better-'appearingchair: f

To this-fend i 1P provide-1sthevlowerijend lof th'ebacIr-stairdard37,wtlrfafvertieal slot 38:,- the same beiirgdisposed lengthwise-:theyoke2e' andf arirrsf 1 16- oriY thechairladjustments Through? i thisI slotKandi al su bleh aperture 3.9i; irmedfn the reariwali :oithefyokeguspassed"a'clampiiigfb'olt 40?. TV' headof the bolt bears upon the-ro-itfacetofl the standard at eaehf= side of theslot 387, and upofn-:thefwrear end or thefts-1t;- beyoirdi the rearl wall :off the yoke; ris threaded-1.a' Mandi WheelL4 this o1"` similari equivaient l arraiigfmentitlwill bei apparent 'ltheifstaifc'lard mayifbe 'raised'Y and'low-ered', andi with tgthe" backpad carrieaftlrerebyguso thattheflattermay b'ef Y'positieliedito suiftthe easel' andcomfort oi' the occupanti?Atfthesametimeysueh ease'a'rrd -4comfortlmayloefurther@ contributed tobfy-rv 'tilting theel starida nditSlyOke whereby other s inclined-:to4the Vdesired degree.

Having described* invention; what I claim, i-is: Y f

13 In:aiehairradjastmeat; thercombimti'oni with v-oppositerearlwardlydisposedstandardel supportingfyarms, of U-shap'ed lyok'efpiif-Votedbetween? thel l arms and provided? near its'i'iee end with fcurve'd'slots concentric with its pivots; clanipingeboti-passed througl'l iftheiarmsifaiird @the curved? slots, a clampngiflranawheethreaded.'0n-thema, and a'ba'ekesupp oitiiigf standardnrount'edin theyokei 2; 11n 1a'@chair-adjustment;the combination with oppositerearwardly disposed =standfrndf-I supportingfarmsgvofla MishapedIkyokeff `pving the opposite sides near their free ends provided withslots curved and concentric with said pivots, a clamping-bolt passedthrough the slots and the arms, a spacingsleeve carried by the bolt andinterposed between the sides of the yoke, a clamping hand-wheel threadedon one end of the yoke, and a back-standard carried by the yoke.

3. In a chair-adjustment, the combination with rearwardly disposedstandard-supporting arms, of a U-shaped yoke tiltably and adjustablymounted between the same, and a back-standard vertically adjustable insaid 7oke. b l. In a chair-adjustment, the combination with oppositerearwardly disposed standardsupporting arms, of a Ueshaped yoke tiltablyand adjustably mounted between the same, a back-standard provided at itslower end with a longitudinal slot, a clampingbolt passed through thelatter and the yoke, and a clamping hand-wheel threaded n one end of thebolt.

5. In a chair-adjustment, the combination with opposite rearwardlydisposed standardsupporting arms, of a U-shaped yoke pivoted near itsrear end between the same and having its opposite sides near their freeends provided with companion curved slots concentric with said pivots, aclamping-bolt passed through said slot-s and through correspondingapertures ormed in the arms, a

back-standard longitudinally slotted from front to rear mounted in saidyoke and adapted to be vertically raised and lowered therein, aclamping-bolt passed through the longitudinal slot of the standard andthrough a corresponding aperture formed in the rear wall of the yoke,and a clamping hand-wheel 1Ifiounted on the rear threaded end of saidolt.

6. In a chair-adjustment, the combination with opposite rearwardlydisposed spring supported standard-supporting arms, of a standardreceiving device pivoted between the arms, and a back-supportingstandard vertically adjustable in the said receiving device. v

7. In a chair-adjustment, the combination with a rearwardly disposedstandard-support, of a standard receiving device pivoted thereto, and aback-standard mounted for vertical adjustment in said receiving device.

CHARLES J. TRAVERS.

Witnesses:

T. A. BOERNER, I-I. W. BoLENs.

@epica of this patent may be obtained for ve cents each, by addressingthe Commissioner o! Patents,

Washington, D. C.

